Add SelectableLabel Custom Renderer to allow copy of note text (#1564)

* Add SelectableLabel Custom Renderer to allow copy of note text
- Remove SelectableLabelEffect

* Remove editor changes from text custom field

src/Android/Renderers/SelectableLabelRenderer.cs

@@ -0,0 +1,25 @@
+using System;
+using Android.Content;
+using Bit.App.Controls;
+using Bit.Droid.Renderers;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.Android;
+
+[assembly: ExportRenderer(typeof(SelectableLabel), typeof(SelectableLabelRenderer))]
+namespace Bit.Droid.Renderers
+{
+    public class SelectableLabelRenderer : LabelRenderer
+    {
+        public SelectableLabelRenderer(Context context) : base(context) { }
+
+        protected override void OnElementChanged(ElementChangedEventArgs<Label> e)
+        {
+            base.OnElementChanged(e);
+
+            if (Control != null)
+            {
+                Control.SetTextIsSelectable(true);
+            }
+        }
+    }
+}